阳水狗年(male Water-Dog)9 or −372 or −1144— to —阴水猪年(female Water-Pig)10 or −371 or −1143

Year 118 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cato and Rex (or, less frequently, year 636 Ab urbe condita) and the Fifth Year of Yuanshou. The denomination 118 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.